In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
RDMA\/nldev: Fix locking when accessing mr->pd<\/p>\n
Sashiko points out that, due to rereg_mr, the PD is actually variable and
\nall the touches in nldev are racy.<\/p>\n
Use mr->device instead of mr->pd->device.<\/p>\n
Getting the PD restrack ID is more tricky. To avoid disturbing all the
\nhappy paths, add an rdma_restrack_sync() operation which is sort of like
\nflush_workqueue() or synchronize_irq(): after it returns, all the old
\nnldev touches to the mr are gone and everything sees the new PD. This
\nmakes it safe to reach into the PD pointer.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
RDMA\/nldev: Fix locking when accessing mr->pd<\/p>\n
Sashiko points out that, due to rereg_mr, the PD is actually variable and
\nall the to<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-8562","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/8562","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}